Ethyne, fluoro-


Gas phase thermochemistry data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Quantity Value Units Method Reference Comment
Δfgas125.52kJ/molReviewChase, 1998Data last reviewed in December, 1967
Quantity Value Units Method Reference Comment
gas,1 bar231.61J/mol*KReviewChase, 1998Data last reviewed in December, 1967

Gas Phase Heat Capacity (Shomate Equation)

Cp° = A + B*t + C*t2 + D*t3 + E/t2
H° − H°298.15= A*t + B*t2/2 + C*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 − E/(2*t2) + G
    Cp = heat capacity (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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View table.

Temperature (K) 298. to 1400.1400. to 6000.
A 49.2435979.13116
B 38.226284.001829
C -16.60345-0.732129
D 2.9513770.046889
E -0.617115-10.76882
F 107.208779.92528
G 277.0423299.4116
H 125.5200125.5200
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in December, 1967 Data last reviewed in December, 1967

Reaction thermochemistry data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: John E. Bartmess

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Individual Reactions

C2F- + Hydrogen cation = Ethyne, fluoro-

By formula: C2F- + H+ = C2HF

Quantity Value Units Method Reference Comment
Δr<1540. ± 79.kJ/molD-EAThynne and MacNiel, 1971gas phase; From CH2=CF2
Quantity Value Units Method Reference Comment
Δr<1510. ± 79.kJ/molH-TSThynne and MacNiel, 1971gas phase; From CH2=CF2

Gas phase ion energetics data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias
L - Sharon G. Lias

Data compiled as indicated in comments:
B - John E. Bartmess
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

View reactions leading to C2HF+ (ion structure unspecified)

Quantity Value Units Method Reference Comment
IE (evaluated)11.26eVN/AN/AL
Quantity Value Units Method Reference Comment
Proton affinity (review)686.kJ/molN/AHunter and Lias, 1998HL
Quantity Value Units Method Reference Comment
Gas basicity661.3kJ/molN/AHunter and Lias, 1998HL

Ionization energy determinations

IE (eV) Method Reference Comment
11.26PEBieri, Schmelzer, et al., 1980LLK
11.5 ± 0.1EIKloster-Jensen, Pascual, et al., 1970RDSH
11.26PEHaink, Heilbronner, et al., 1970RDSH

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
CF+17.0 ± 0.1CHEIKloster-Jensen, Pascual, et al., 1970RDSH
CH+19.2 ± 0.2CFEIKloster-Jensen, Pascual, et al., 1970RDSH

De-protonation reactions

C2F- + Hydrogen cation = Ethyne, fluoro-

By formula: C2F- + H+ = C2HF

Quantity Value Units Method Reference Comment
Δr<1540. ± 79.kJ/molD-EAThynne and MacNiel, 1971gas phase; From CH2=CF2; B
Quantity Value Units Method Reference Comment
Δr<1510. ± 79.kJ/molH-TSThynne and MacNiel, 1971gas phase; From CH2=CF2; B

References

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Chase, 1998
Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]

Thynne and MacNiel, 1971
Thynne, J.C.J.; MacNiel, K.A.G., Negative ion formation by ethylene and 1,1-difluoroethylene, J. Phys. Chem., 1971, 75, 2584. [all data]

Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G., Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update, J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018 . [all data]

Bieri, Schmelzer, et al., 1980
Bieri, G.; Schmelzer, A.; Asbrink, L.; Jonsson, M., Fluorine and the fluoroderivatives of acetylene and diacetylene studied by 30.4 nm He(II) photoelectron spectroscopy, Chem. Phys., 1980, 49, 213. [all data]

Kloster-Jensen, Pascual, et al., 1970
Kloster-Jensen, E.; Pascual, C.; Vogt, J., Mass spectrometric studies of mono- and di-haloacetylenes,, Helv. Chim. Acta, 1970, 53, 2109. [all data]

Haink, Heilbronner, et al., 1970
Haink, H.J.; Heilbronner, E.; Hornung, V.; KlosterJensen, E., Die Photoelektron-Spektren der Monohalogenacetylene, Helv. Chim. Acta, 1970, 53, 1073. [all data]


Notes

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